diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff')
-rw-r--r-- | meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff b/meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff new file mode 100644 index 0000000000..79871a7208 --- /dev/null +++ b/meta/recipes-kernel/linux/linux-omap2-git/beagleboard/06-ensure-fclk.diff | |||
@@ -0,0 +1,31 @@ | |||
1 | From: Mans Rullgard <mans@mansr.com> | ||
2 | Date: Mon, 7 Jul 2008 23:59:08 +0000 (+0100) | ||
3 | Subject: omapfb: ensure fck/lcd < 173MHz | ||
4 | X-Git-Url: http://git.mansr.com/?p=linux-omap;a=commitdiff_plain;h=0523ece1bad659c48c66aea364d83f7490e7e5ae | ||
5 | |||
6 | omapfb: ensure fck/lcd < 173MHz | ||
7 | --- | ||
8 | |||
9 | diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c | ||
10 | index c17371c..85d6cad 100644 | ||
11 | --- a/drivers/video/omap/dispc.c | ||
12 | +++ b/drivers/video/omap/dispc.c | ||
13 | @@ -738,14 +738,16 @@ static void setup_color_conv_coef(void) | ||
14 | MOD_REG_FLD(at2_reg, (1 << 11), ct->full_range); | ||
15 | } | ||
16 | |||
17 | +#define MAX_FCK_LCD 173000000 | ||
18 | + | ||
19 | static void calc_ck_div(int is_tft, int pck, int *lck_div, int *pck_div) | ||
20 | { | ||
21 | unsigned long fck, lck; | ||
22 | |||
23 | - *lck_div = 1; | ||
24 | pck = max(1, pck); | ||
25 | fck = clk_get_rate(dispc.dss1_fck); | ||
26 | - lck = fck; | ||
27 | + *lck_div = (fck + MAX_FCK_LCD - 1) / MAX_FCK_LCD; | ||
28 | + lck = fck / *lck_div; | ||
29 | *pck_div = (lck + pck - 1) / pck; | ||
30 | if (is_tft) | ||
31 | *pck_div = max(2, *pck_div); | ||